<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8">
    <title>WebSocket</title>

    <script>
    console.log('WebSocket');
    // 打开一个 web socket
    var ws = new WebSocket("ws://localhost:8002/");
    ws.onopen = function() {
        // Web Socket 已连接上，使用 send() 方法发送数据
        ws.send("123");
        console.log("数据发送中...");
    };

    ws.onmessage = function (evt) { 
        var received_msg = evt.data;
        console.log("数据已接收...", received_msg);
    };

    ws.onclose = function() { 
        // 关闭 websocket
        console.log("连接已关闭..."); 
    };
    function sendmsg() {
        console.log("数据发送中");
        ws.send("aaa");
    }
    </script>
</head>
<body>

<div id="sse">
    <div onclick="sendmsg()">发送1</div>
</div>

</body>
</html>